Perpetual calendar



May 23, m45 l J. KAUFMAN PERPETUAL CALENDAR Filed Sp'c; 27, 5.944

F\ ma omas KAI/@wm IN VEN TOR.

upon the instrument Patented May 28, 1946 i 'i UNITED `STATES PATENT` FFICE b 2,401,162 j PERPETUAL CALENDAR Jonas Kaufman, Hutchinson County, S. Dak. Application september 27, 1944, serial No. 555,928

6 Claims.

This invention relates to a perpetual calendar, and is a continuation in part of Vmy application Serial No. 520,854, filed February 3, 1944, for a patent on the same invention.

This invention can be used as a part f a desk set, as Well as a wall calendar, and can be used as a permanent fixture in the front part' of an automobile or truck, or may be placed board of an airplane or ship.

It requires setting but once a month and can be reset in a few seconds of time in such a manner that it currently shows consecutively'each and every day of whatever month it may be set for. All the date-carrying parts of the calendar are resettable and hence do not have to be renewed.

It is an object of the invention to provide an improved means for adjusting the date indicating suitable horizontal surface.

they form a part, `a stable means for supporting the cover plate in an upstanding position 'upon a These flanges are suitably apertured to provide bearings for a rotatable screw rod I2 and for a non-threaded, preferably square rod I3said rods being parallel,

`the rod I3 being spaced vertically below the numerals occurring `near month ends in such a manner that the correct week-day indication for such dates will be alforded by the calendar.

Speaking more specifically it is an object of the invention vto provide a simplilied gear operable means for adjusting in the correct manner date indicating numerals occurring near the ends of the months.

Other objects, advantages and features of invention will hereinafter appear.

Referring to the accompanying drawing, which illustrates'what is at present deemed to be a preferred embodiment of the invention,

Fig. 1 is a front View of the calendar showing it somewhat in perspective adjusted for correct date indication for a month containing thirtyone days.

Fig. 2 is also taken somewhat in perspective, the calendar being viewed from the rear.

Fig. 3 is a horizontal section looking up from the line 3 3 of Fig. 2.

Fig. 4 is a horizontal line 4 4 of Fig. 2.

Fig. 5 is a front face View of a shiftable plate having upon it the month-indicating numerals except those above 28. I

- Fig. 6 is a developed face view of the smaller of the rotatable auxiliary date-indicating blocks.

Fig. 7 is a developed face view of the larger date-indicating block.

Referring in detail to the drawing, the elongated, rectangular cover plate 9 as viewed in Fig. 1 has each of its end portions bent backwardly at a right angle thus providing it with the end flanges I0 and II, said flanges being sufficiently inl combination With the lower edge'of the body portion of the plate of which section looking down from rod I2.

Outside of the flange respectively provided and I5 and outside of keepers I6 are used to the rods.

'I'he cover II the rods I?.` and I3 are with operating knobs I4 the flange I0 conventional prevent the withdrawal of plate 9 has through it a large rectangular window or sight opening I 1 above which are the week-day indicatingl letters I8 and through which are displayed date indicating numerals inscribed upon a shiftable rectangular date plate I9. This date platev is somewhat narrower and considerably shorter than the cover plate `9, but ,is similarly shaped, having backwardlydirected endranges 20 and 2I. Said date plate has apertures 22 I2 passes and is supported by said rod with its lower edge above the lower edge of the cover plate 9 so as to clear a table or other horizontal support upon which the device may be placed.

It will be seen that the shiftable date plate I9 hasinscribed upon it a table of month day indicating numerals arranged in vertical columns and horizontal rows, the numbers of each column con,-

secutively increased by seven when read downwardly, and the numbers of each horizontal row being progressively one higher as read from left t0 right.

Screw threads may be formed upon the rod I2 inany suitable manner. As shown inthe drawing said rod is formed of two wire strands twisted upon each other inea uniform manner to function as screw threads, either of the apertures 22 and 23` or both closely conforming t0 the contour of the rod so that when it is rotated it will cause a shifting movement of the date plate I9 longitudinally of the cover plate.

'I'he structural details of the number plate I9 are best shown in Fig. 5, from which view it will be seen that ve rows of date indicating numerals are provided upon said plate, the second, third and fourth rows being partlyduplicative of each other, according to well-known practice in perpetual calendar construction, the table of numerals thus provided beginning with l and ending with 28 so that by shiftably adjusting the date plate I9 in relation tothe weekday l 18 February week days may be indicated for any and 23 through which nie rod` `the window 2 year in which February does not have more than twenty-eight days.

Describing next the means for indicating th'e week days upon which days of the month above 28 fall, a rectangular sight opening 25 is provided through the date plate I9 at about the midlength of said plate at the right hand end of the fourth row of numerals which row ends with 28. The length of this sight opening extends across three columns of numerals and its width is somewhat greater than the vertical dimension of the size of date-indieating numerals shown.

Also, through the lower left h'and corner portion of the date 26. This opening is of the same width as the opening 25, but its length is only about twothirds that of the latter opening, that is to say, sufficient to disclose numerals of a size to occupy two instead of three of the columns of date-indicating numerals.

Two rotatably adjustable number blocks 25d andeZa are provided to display certain month endv numerals through the aferesaid sight openings k2F and 12-5 respectively. The block 35a `has through it a square, centrally located longitudinal passage through whi h the already mentioned rod I3 extends, the block being h eld upon the rod in the position shown to rotate therewith. The block is preferably loose upon the rodV in regard to longitudinal movementa but when the parts are assembled the block is kept from longitudinal movement by a pair of flanges 2l formed by outbending portions of the metal cut out from the plate I9 in making the opening 25, said flanges having apertures sufficiently large to receive rotatably the rod I3. Y

The block 26a is secured to a stub shaft 2B, one end portion of said shaft having'a bearing in the lower part of the end flange 23 of the plate I9 and the opposite end portion of this shaft having its bearing in a flange 23 formed by outbending a part of the material' cut out to form That endportion ofthe stub shaft openingV 25. which has its bearing in flange 2t has secured to it a driven gear SI which meshes with a driving gear 32v fixed to the adjacent part of theshaft I3.

Flange 2li is provided with downwardly directed lip 26a which loosely overlies the upper part of the outer face of gear 32 to keep saidgear in mesh with gear 3i as said gear 32 slides along the square rod I3 during the shiftingY movement of the date plate I9.

plate I9 is another sight openingv `window to display tion thereof shown in Fig. l. Giving the shaft I3 a, quarter turn in a direction moving upwardly the exposed face of the block a as viewed in Fig. 1 will bring into view the next row of numerals 29 30 at the same time will cause on block 26a to register with the sight opening 26 of the date plate. Another quarter turn of shaft I3 in the same direction will bring 29 only into view through the sight opening 25 and will present if.) the front the first of the llWQ blank faces of the block 26a. Still another like quarter turn of shaft I3 will present forwardly the single blank face of block 25a and the second of the blank faces of the block 25a.

What is claimed is:

l. I n calendarof the kind described, the combination, with a cover plate having through it a a table of month dates, there being a row of week day indicators along an edge portion of said window; of a shiftable date plate having inscribed upon it vertical columns and v horizontal rows of month day indicating numbers, the numbers of each column consecutively increased by seven when read downwardly and the numbers of each row being progressively one higher as read from left to right, said date plate having through it two sight openings positioned to have displayed through them month end dates in addition to those in the aforesaid table, said table ending with the number 28'v located at approximately the midlength of said date plate and one of said sight openings being located immediately to the right thereof, the other of said sight openings being located immediately below the lower left hand position of said table, and a separate month-end number display means ro-Y tatably carried by said date plate behind each of said sight openings and collectively operable to display circumferentially arranged varying montheend date indicating numbers there-v through. y

2. In a calendar ofthe kind described, the combination, with a cover plate having through it a Vwindow to display a table of month dates, there Y being a row of week day indicators along an edge The rotatable blocks 25a and 25a areboth square as viewed in cross section so that the date-indicating numerals may be conveniently placed upon them.V The faces of these blocks are shown in a developed fashion in Figs. 8 and 7.

The gears, shafts and blocks which have been mentioned are assembled in such a relation to each other that they cooperate properly2 in conjunction with the shifting of the date plate I9 by rotating the screw shaftl I2, to fill ou* properly the varying month-end dates. With thisen d in view the block 25a has one face'provided with the row of numerals 29 30 Y3l, which numerals are shown in Fig. l displayed both through I'I of the cover 9 and the sight opening 25 of the number plate i9, the geared relation of the two blocks to each other being such rthat when said numerals of the block 25d are brought into View the numerals 30. 31 on one face of the block 25a will register with the opening 26 in the date plate I9., but 4the latter riumerals will not be visible except when said date plato is shifted for vcolumns leftward of the posi..

portion of said window; of a shiftable date plate having inscribed upony it vertical columns and horizontal rows of month day indicating nume bers, the numbers of each column consecutively increased by seven when read downwardly and the numbers of each row being progressively one higher as read from left to right, said date plate having through it two sight openings positioned to have displayed through them month end dates in addition to those in the aforesaid table, said table ending with' the number 2.8 located at approximately the midlength of said date plate and one of said sight openings being located im-Y mediately to the right thereof,V the other of said sight openings being located immediately below the lower left hand portion o f said table, a` block rotatably mounted upon said shiftable plate behind each of said sight openings and inscribed with circumferentially arranged month-end day indicating numbers, and means to rotationally adjust said blocks so as to bring the proper month-end day indicatingnumbers into view through said sight openings.

3. The subject matter of claimv 2, and said means for rotatonallv adjusting said blocks beine connootedwith only one of thorn, and means whereby said one block is mechanically opera.-4 tively connected.. to the other block so that the (see lFig. 7) on said block, and

latter block is properly adjusted when said one block is rotated to the desired position.

4. In a calendar of the kind described, the combination, with a cover plate having through it a window to display a table of month dates, there being a row of week day indicators along an edge portion oi said window; of a shiitable date plate having inscribed upon it vertical columns and horizontal rows of month day indicating numbers, the numbers of each column consecutively increased by seven when read downwardly and the numbers of each row being progressively one higher as read from left to right, said date plate having through it two sight openings positioned to have displayed vthrough them month end dates in addition to those in the aforesaid table, said table ending with the number 28 located at approximately the midlength or` said date plate and one of said sight right thereof, the other of said sight openings being located irnmediately below the lower left hand portion oi said table, a screw rod rotatably mounted upon said cover plate in a supporting relation to said date pla-te for rotation to shift the latter plate to bring the number columns thereof into alinernent with the proper 5. In a calendar of the kind described, the comopenings being being a row day indicators along an edge portion of said wind w; of a shiftable date plate having inscribed upon it vertical columns and horizontal rows of month day indicating numbers, the numbers of each column consecutively increased by seven when read downwardly and the numbers of each row higher as read from left to right, said date plate having through ittwo sight openings positioned to have displayed through them month end dates in addition to those in the aforesaid table, said table ending with the number 28 located at approximately the midlength of said date plate and one of said sight openings being located immediately to the right thereof, th'e other of said sight openings being located immediately below behind each of said sight openings and inscribed with circumferentially arranged month-end day indicating numbers, a rod Whereon one of said blocks is mounted, a stub shaft whereon the other of said blocks is mounted, said rod and stub shaft being rotatably mounted upon said shiftable plate, and gearing whereby said rod-mounted block is mechanically operatively connected with the other block so that the latter is properly adjusteol when said rod-mounted block is rotated to the desired position,

which' is mounted upon said rod in a slidable, nonrotatable relation thereto.

6. The subject matter of claim of flanges carried by said shiftable plate and positioned to maintain said rod-mounted block in registry with the sight opening with which it JONAS KAUFMAN.

5, and a pair 

